EP1226922B2 - Device and method for extrusion of polyethyleneterephthalate - Google Patents

Device and method for extrusion of polyethyleneterephthalate Download PDF

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Publication number
EP1226922B2
EP1226922B2 EP02075305A EP02075305A EP1226922B2 EP 1226922 B2 EP1226922 B2 EP 1226922B2 EP 02075305 A EP02075305 A EP 02075305A EP 02075305 A EP02075305 A EP 02075305A EP 1226922 B2 EP1226922 B2 EP 1226922B2
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EP
European Patent Office
Prior art keywords
zone
degassing
extruder
screws
polyethyleneterephthalate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02075305A
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German (de)
French (fr)
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EP1226922A1 (en
EP1226922B1 (en
Inventor
Franco Bandera
Enrico Venegoni
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Costruzioni Meccaniche Luigi Bandera SpA
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Costruzioni Meccaniche Luigi Bandera SpA
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Application filed by Costruzioni Meccaniche Luigi Bandera SpA filed Critical Costruzioni Meccaniche Luigi Bandera SpA
Priority to DE60209993T priority Critical patent/DE60209993T3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/76—Venting, drying means; Degassing means
    • B29C48/765—Venting, drying means; Degassing means in the extruder apparatus
    • B29C48/766—Venting, drying means; Degassing means in the extruder apparatus in screw extruders
    • B29C48/767—Venting, drying means; Degassing means in the extruder apparatus in screw extruders through a degassing opening of a barrel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/04—Particle-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • B29C48/402—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders the screws having intermeshing parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • B29C48/405—Intermeshing co-rotating screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/535—Screws with thread pitch varying along the longitudinal axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material

Definitions

  • the present invention relates to an equipment and a method for the extrusion of polyethyleneterephthalate.
  • PET Polyethyleneterephthalate
  • This traditional dehumidification process consists in keeping a quantity of material equal to the productive rate of the extruder (kg/h), for 6 hours in a silo, and passing humidity-free air through it, with a considerable energy consumption.
  • This material in fact, over a temperature of 80°C, tends to soften and, if it is not in granule form, as in this case, it conglomerates and can no longer be handled, unless its apparent weight is increased by means of an additional densification process.
  • US-A-4 107 787 relates to a screw extruder for continuously processing and degassing of elastomers and polymers having a plurality of degassing zones and in which two screws rotatable in opposite direction are mounted.
  • the preamble of claim 1 starts of this prior art document.
  • US-A-5 728 337 refers to a twin screw extruder and an extruding method using such an extruder for a resin material that contains a fine filler with the high-mixing ratio relative to the resin material.
  • the objective of the present invention is to produce equipment which overcomes the technical problems described above.
  • a further objective is to produce equipment which is particularly simple and with limited costs, which allows an optimum extrusion to be achieved.
  • PET polyethyleneterephthalate
  • this illustrates a schematic plant showing a process according to the known art, previously described.
  • the figure shows how polyethyleneterephthalate (PET), ground into granules and coming from the recovery of bottles, thermoforming waste sheets, etc., is fed by means of a conveyor 11 towards a densifying group indicated with 12 from which it is sent in turn by means of a duct 13 towards a silo container 14.
  • PET polyethyleneterephthalate
  • the material is subsequently sent, by means of a further duct 15, to a hopper 16 in which it is kept for about 6 hours at a temperature of 160°C.
  • the hopper is coupled with a dehumidifying group 17 which allows this temperature to be maintained inside the hopper 16.
  • PET polyethyleneterephthalate
  • the hopper 19 is also coupled with a dehumidifying group 20 which allows this temperature to be maintained inside the hopper 19.
  • a piping 21 leaving the hopper 19 is connected to an additional hopper 22 for feeding a co-rotating twin-screw extruder 23 of the known type.
  • a second piping 24 is connected to the hopper 16 and receives the densified and dehumidified ground recovered material to be charged into the extruder 23, together with the master fed from a further hopper 25.
  • Figures 2-7 illustrate a co-rotating twin-screw extruder, indicated as a whole with 30, which forms the equipment object of the present invention.
  • Two screws 31 and 32 co-rotating in the same rotational direction, are situated in this extruder 30, inside a chassis 29.
  • This zone B consists in the presence of a series of cams 36, situated on the screws 31, 32, which are loaded with almost molten material and under slight pressure. This expedient prevents the strong vacuum of the subsequent degassing group described hereafter, from influencing the previous environmental degassing.
  • a first chimney 37 is, in fact, situated in a zone C, followed at a short distance by a second chimney 38, in a further zone D, both for additional degassing.
  • These two chimneys effect a tandem degassing which, for example, in an extruder with a length ratio of 34 to 42 diameters, can be at a distance between the two chimneys of about 6/9 diameters.
  • the screw is constructed so as to be only partially filled with molten material and to expose the material being treated to crushing and calendering action for a long time. In this way, the whole of the mass is subjected to the aspirating action of the vacuum effect thus created.
  • This degassing has the specific function of removing the evaporated water contained in the material.
  • the extruder 30 then continues with a further zone E in which carrying and loading are effected, activated by the screws 31 and 32.
  • a final zone F of the extruder 30 activates the final pumping of the material produced with said process.
  • This series of phases carried out in the extruder of the present invention thus allows a humid granular material to be treated, avoiding complicated dehumidification operations.
  • PET polyethyleneterephthalate material
  • this additional degassing phase is effected by means of two tandem chimneys to optimize the operation.
  • a carrying and loading phase is subsequently effected, which facilitates the amalgamation of the molten material, followed by a final pumping phase, obtaining the extrusion of polyethyleneterephthalate (PET) deriving from granules of both virgin material and also material coming from the grinding of recovered products.
  • PET polyethyleneterephthalate

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Polyesters Or Polycarbonates (AREA)

Abstract

Polyethyleneterephthalate extrusion equipment of material in granule form, still humid, coming from both ground recovered products and also virgin material, comprising a chassis (29), containing a co-rotating, oil-thermoregulated extruder with two screws (31, 32), which comprises a first zone (A), equipped with an opening (34) where there is an aspiration hood (35) for a first "open top" degassing, a second zone (C) where there is at least one stack (37, 38) for a further degassing, between the two zones (A, C), there being a tight zone (B), and a carrying and loading zone (E) activated by the screws (31, 32). The description also relates to an extrusion process of polyethyleneterephthalate effected in a co-rotating twin-screw extruder which comprises in a first zone (A) an "open top" degassing phase, followed by a stack (37, 38) degassing phase, between the two phases there being a tight zone which does not deteriorate the material, followed by a carrying, loading and amalgamation phase of the molten material and a final pumping phase with the extrusion of polyethyleneterephthalate. <IMAGE>

Description

  • The present invention relates to an equipment and a method for the extrusion of polyethyleneterephthalate.
  • Polyethyleneterephthalate (PET) is an extremely hygroscopic material; it is packaged and sold by manufacturers in the form of granules, with a degree of humidity equal to about 2,000 parts per million.
  • Before being able to be extruded, it is first dehumidified at 160°C for 6 hours, in order to eliminate the humidity internally and externally incorporated in each granule, up to 20 parts per million. Under these conditions, the material cannot be extruded without its hydrolyzing and so that it maintains a characteristic intrinsic viscosity.
  • Traditional dehumidification processes take place in most cases before the extrusion phase with single screws and prove to be complex and costly.
  • This traditional dehumidification process consists in keeping a quantity of material equal to the productive rate of the extruder (kg/h), for 6 hours in a silo, and passing humidity-free air through it, with a considerable energy consumption.
  • Furthermore, it should be considered that, when PET comes from the recovery of ground post-consumption bottles and/or ground thin sheets deriving from waste products from the thermoforming of trays and blisters, dehumidification becomes particularly complex.
  • This material, in fact, over a temperature of 80°C, tends to soften and, if it is not in granule form, as in this case, it conglomerates and can no longer be handled, unless its apparent weight is increased by means of an additional densification process.
  • US-A-4 107 787 relates to a screw extruder for continuously processing and degassing of elastomers and polymers having a plurality of degassing zones and in which two screws rotatable in opposite direction are mounted. The preamble of claim 1 starts of this prior art document. US-A-5 728 337 refers to a twin screw extruder and an extruding method using such an extruder for a resin material that contains a fine filler with the high-mixing ratio relative to the resin material.
  • The objective of the present invention is to produce equipment which overcomes the technical problems described above.
  • A further objective is to produce equipment which is particularly simple and with limited costs, which allows an optimum extrusion to be achieved.
  • An additional objective is obviously to be able to produce polyethyleneterephthalate (PET) without having to dehumidify and densify the ground product.
  • These objectives according to the present invention are achieved by a device for the extrusion of polyethyleneterephthalate according to claim 1, and on method thereof according to claim 6.
  • Further characteristics of the invention are indicated in the subsequent claims.
  • The characteristics and advantages of a set of equipment for the extrusion of polyethyleneterephthalate according to the present invention can be more clearly understood from the following illustrative and non-limiting description, referring to the schematic drawings enclosed, wherein:
    • figure 1 is an elevation side-view of a schematic plant illustrating a process according to the known art,
    • figure 2 shows an elevation view of a co-rotating twin-screw extruder according to the present invention, schematic and partially sectioned,
    • figure 3 is a schematic cross-section of the two screws of the twin-screw extruder,
    • figure 4 is an enlarged section of an upper part of the extruder,
    • figures 5, 6 and 7 are enlarged views of details of a section of the extruder illustrated in figure 4.
  • With reference to figure 1, this illustrates a schematic plant showing a process according to the known art, previously described.
  • The figure shows how polyethyleneterephthalate (PET), ground into granules and coming from the recovery of bottles, thermoforming waste sheets, etc., is fed by means of a conveyor 11 towards a densifying group indicated with 12 from which it is sent in turn by means of a duct 13 towards a silo container 14.
  • The material is subsequently sent, by means of a further duct 15, to a hopper 16 in which it is kept for about 6 hours at a temperature of 160°C. The hopper is coupled with a dehumidifying group 17 which allows this temperature to be maintained inside the hopper 16.
  • Parallelly, polyethyleneterephthalate (PET) as virgin material in granule form, is fed by means of a piping 18, to a hopper 19 in which it is kept for about 6 hours at a temperature of 160°C. The hopper 19 is also coupled with a dehumidifying group 20 which allows this temperature to be maintained inside the hopper 19. A piping 21 leaving the hopper 19 is connected to an additional hopper 22 for feeding a co-rotating twin-screw extruder 23 of the known type.
  • A second piping 24 is connected to the hopper 16 and receives the densified and dehumidified ground recovered material to be charged into the extruder 23, together with the master fed from a further hopper 25.
  • It can therefore be noted that particularly complex dehumidification phases must be effected, which create the problems of the known art described above.
  • Figures 2-7 illustrate a co-rotating twin-screw extruder, indicated as a whole with 30, which forms the equipment object of the present invention.
  • Two screws 31 and 32, co-rotating in the same rotational direction, are situated in this extruder 30, inside a chassis 29. -The polyethyleneterephthalate material in the form of granules, still humid, coming from both recovery products and virgin material, is fed by means of a feeding inlet 33. This material, according to the invention, is treated between the two screws 31 and 32 so as to advance inside the extruder which is, for example, oil thermoregulated.
  • After a certain length inside the body of the extruder 30, there is an opening 34 in a first zone A, in correspondence with which there is an aspiration hood 35 which effects a degassing called "open top" or environmental degassing. This aspiration hood 35 is under slight vacuum to prevent the material (granule/sheet), which in this position of the above extruder is not yet molten, but only sintered, from being damaged. The material, in fact, only partially fills the air gaps of the screws 31, 32 and any possible strong vacuum could remove a part of it.
  • Proceeding inside the extruder 30, in a subsequent second zone B, there is a series of parts which acts as a seal. This zone B consists in the presence of a series of cams 36, situated on the screws 31, 32, which are loaded with almost molten material and under slight pressure. This expedient prevents the strong vacuum of the subsequent degassing group described hereafter, from influencing the previous environmental degassing.
  • A first chimney 37 is, in fact, situated in a zone C, followed at a short distance by a second chimney 38, in a further zone D, both for additional degassing. These two chimneys effect a tandem degassing which, for example, in an extruder with a length ratio of 34 to 42 diameters, can be at a distance between the two chimneys of about 6/9 diameters.
  • Internally, the screw is constructed so as to be only partially filled with molten material and to expose the material being treated to crushing and calendering action for a long time. In this way, the whole of the mass is subjected to the aspirating action of the vacuum effect thus created.
  • This degassing has the specific function of removing the evaporated water contained in the material.
  • The extruder 30 then continues with a further zone E in which carrying and loading are effected, activated by the screws 31 and 32.
  • Finally, a final zone F of the extruder 30 activates the final pumping of the material produced with said process.
  • This series of phases carried out in the extruder of the present invention thus allows a humid granular material to be treated, avoiding complicated dehumidification operations.
  • In said process, in fact, polyethyleneterephthalate material (PET) in granules, coming from both virgin material and also from the grinding of recovered products, is fed into a co-rotating twin-screw extruder in its present condition, i.e. containing humidity.
  • Once a mixture of the two types of material specified above, has been charged, there is an environmental degassing phase in a first zone provided with an aspiration hood, followed by a further degassing phase by means of at least one chimney. Between the two phases, a tight zone is necessary, inside the apparatus, for not influencing the two phases and deteriorating the material under production.
  • In particular, this additional degassing phase is effected by means of two tandem chimneys to optimize the operation.
  • A carrying and loading phase is subsequently effected, which facilitates the amalgamation of the molten material, followed by a final pumping phase, obtaining the extrusion of polyethyleneterephthalate (PET) deriving from granules of both virgin material and also material coming from the grinding of recovered products.
  • The problems of the known art described above are thus solved by eliminating the dehumidification phases and the equipment associated therewith, with a considerable saving of resources and operating time.

Claims (6)

  1. Polyethyleneterephthalate extrusion equipment of material in granule form, in particular for humid granulate, coming from both ground recovered products and also virgin material, comprising a chassis (29), containing an oil-thermoregulated extruder with two screws (31, 32), said extruder having a feeding inlet (33) for the material in granulate form and comprising a plurality of degassing zones A, C, D equipped with openings (34, 35; 37, 38), a tight zone (B) and a carrying and loading zone (E) activated by said screws (31, 32), characterized in that the two screws (31, 32) of said extruder are co-rotating in the same rotational direction and in that a first degassing zone (A) is provided with an aspiration hood (35) towards the environmental, a second degassing zone (C and D) is provided with two chimneys (37, 38) in tandem, between said first and second degassing zones (A; C and D) being positioned a tight zone (B) to prevent the deterioration of the material under production.
  2. The extrusion equipment according to claim 1, characterized in that it comprises a further final zone (F) which activates the final pumping of the material produced with said equipment.
  3. The extrusion equipment according to claim 1, characterized in that said tight zone (B) is produced by a series of cams (36) situated on said screws (31, 32) which are loaded with almost molten material and under slight pressure.
  4. The extrusion equipment according to any of the previous claims, characterized in that said extruder has a length ratio of 34 to 42 diameters.
  5. The extrusion equipment according to claim 1, characterized in that in said extruder the two chimneys (37,38) which effect a tandem degassing, are at a distance of about 6/9 diameters.
  6. A polyethyleneterephthalate extrusion process using as material in granule form a humid granulate, coming from both ground recovered products and virgin material, effected in a twin-screw extruder divided in a plurality of zones (A, C, D) having openings (34, 35; 37, 38), said process comprising successive degassing phases in different zones, a carrying and loading phase, followed by a final pumping phase where the extrusion of polyethyleneterephthalate is obtained, characterized in that said process, which is realized in a co-rotating twin-screw extruder in which the screws rotate in the same rotational direction comprises a first degassing phase of a material in granule form in a first zone (A) provided with an aspiration hood (35) towards the environmental, followed by a second degassing phase in a successive zone (C and D) by means of two chimneys (37, 38) in tandem, said first and second degassing phases being tightly separated to prevent the deterioration of the material under production.
EP02075305A 2001-01-29 2002-01-24 Device and method for extrusion of polyethyleneterephthalate Expired - Lifetime EP1226922B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE60209993T DE60209993T3 (en) 2001-01-29 2002-01-24 Apparatus and process for the extrusion of polyethylene terephthalate

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI20010152 2001-01-29
IT2001MI000152A ITMI20010152A1 (en) 2001-01-29 2001-01-29 POLYETHYLENE TEREPHALATE EXTRUSION EQUIPMENT

Publications (3)

Publication Number Publication Date
EP1226922A1 EP1226922A1 (en) 2002-07-31
EP1226922B1 EP1226922B1 (en) 2006-03-22
EP1226922B2 true EP1226922B2 (en) 2011-07-27

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EP02075305A Expired - Lifetime EP1226922B2 (en) 2001-01-29 2002-01-24 Device and method for extrusion of polyethyleneterephthalate

Country Status (8)

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US (1) US6583261B2 (en)
EP (1) EP1226922B2 (en)
AT (1) ATE320906T1 (en)
DE (1) DE60209993T3 (en)
DK (1) DK1226922T3 (en)
ES (1) ES2260383T5 (en)
IT (1) ITMI20010152A1 (en)
PT (1) PT1226922E (en)

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ITMI20080927A1 (en) * 2008-05-20 2009-11-21 Meccaniche Luigi Bander A S P RELATIVE PHOTOVOLTAIC PANEL PRODUCTION PROCEDURE AND PLANT FOR THE REALIZATION OF SUCH PROCEDURE
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CN103183188A (en) * 2011-12-28 2013-07-03 富泰华工业（深圳）有限公司 Forming system
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CN107364105B (en) * 2017-08-22 2019-07-23 南京达力特挤出机械有限公司 A kind of rubber extruding integrated molding extruder
WO2019191085A1 (en) 2018-03-29 2019-10-03 Entek Manufacturing Llc Multiple screw extruder implemented with vacuum vent and screws configured to densify, or extract fluid from, material processed by the extruder
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DE60209993T3 (en) 2012-01-12
EP1226922A1 (en) 2002-07-31
DK1226922T3 (en) 2006-07-31
PT1226922E (en) 2006-08-31
US20020100995A1 (en) 2002-08-01
ITMI20010152A1 (en) 2002-07-29
US6583261B2 (en) 2003-06-24
ES2260383T5 (en) 2011-12-07
EP1226922B1 (en) 2006-03-22

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